Mashable - There's a reason the Evernote logo is an elephant. Because when used correctly, this helpful, versatile, free app will make sure you never forget anything ever. Just like an elephant.
If you're unfamiliar with Evernote, the app utilizes "notebooks" — basically a system of folders and subfolders that become increasingly helpful as you create more. Greater organization makes it easier to recall exactly what you need at a later date, across any platform.